#!/usr/bin/python3
# -*- coding: utf-8 -*-
"""
ZetCode PyQt5 tutorial
In this example, we connect a signal
of a QSlider to a slot of a QLCDNumber.
Author: Jan Bodnar
Website: zetcode.com
Last edited: January 2017
"""
import sys
from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import (QWidget, QLCDNumber, QSlider,
QVBoxLayout, QApplication)
class Example(QWidget):
def __init__(self):
super().__init__()
self.initUI()
def initUI(self):
lcd = QLCDNumber(self)
sld = QSlider(Qt.Horizontal, self)
vbox = QVBoxLayout()
vbox.addWidget(lcd)
vbox.addWidget(sld)
self.setLayout(vbox)
sld.valueChanged.connect(lcd.display)
self.setGeometry(300, 300, 250, 150)
self.setWindowTitle('Signal and slot')
self.show()
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())
上面的例子中,显示了 QtGui.QLCDNumber
和 QtGui.QSlider
模块,我们能拖动滑块让数字跟着发生改变。
text
sld.valueChanged.connect(lcd.display)
这里是把滑块的变化和数字的变化绑定在一起。
sender
是信号的发送者,receiver
是信号的接收者,slot
是对这个信号应该做出的反应。
程序展示:
标签:__,vbox,self,Signals,QSlider,lcd,QLCDNumber,slots From: https://blog.csdn.net/weixin_72050316/article/details/142067559